The Internal Revenue Service issued guidance on Sept. 8 for the Section 45Z Clean Fuels Production Tax Credit, providing long-awaited clarity for crop and livestock farmers, ranchers and fuel producers seeking to access domestic biofuel markets.
The guidance resolves a significant planning bottleneck that had prevented farmers and fuel producers from making planting, investment and production decisions for the 2026-2027 crop and fuel production cycle.
The IRS notice addresses how agricultural inputs and production methods affect credit eligibility under the One Big Beautiful Bill Act’s biofuel tax credit provisions, the agency said. The guidance covers sustainable aviation fuel, renewable diesel and other biofuels produced from agricultural feedstocks.
For American farmers, the guidance determines which crops and production practices qualify for the tax credit, information essential to decisions about what to plant, how to grow it and where to sell it.
The 45Z credit is designed to incentivize domestic production of clean fuels as an alternative to imported petroleum, the IRS said. The credit’s value depends on the carbon intensity of the fuel produced, creating a financial incentive for lower-emission production methods.
The guidance will shape billions of dollars in investment and production decisions in the U.S. agricultural and biofuel industries. Ethanol producers, biodiesel refineries and farmers who supply feedstock crops all depend on clear tax credit rules to plan their operations.
Sustainable aviation fuel has emerged as a particularly high-value market for biofuel producers, with airlines seeking alternatives to petroleum-based jet fuel under both regulatory and voluntary emissions reduction commitments.
The agricultural sector has pushed for timely guidance since the legislation’s enactment, warning that delays would cause farmers to miss planting windows and fuel producers to defer capital investments until the regulatory landscape was clear.